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#1
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Phantom Power Filtering (removal of phantom power)...
Hey Everyone. I can't seem to find the answer and/or product to
satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris |
#2
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote in message
m Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. |
#3
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote in message
m Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. |
#4
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote in message
m Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. |
#5
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote in message m... Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Two options : 1:1 Isolation Transformer - The better Transformers usually cost more and it is not difficult to spend $100 on a decent Transformer ... Capacitors in Series with the Signal - 47uF is usually adequate but can depend on the input impedance of your mixing desk - typically 1K or so which will give you low Frequency rolloff with a -3dB point of 3Hz Of course the Desks internal Decoupling Caps will be in Series with this so this will probably raise your -3dB point to 7 Hz or so. D Pin 2 ---------------||--------------- Pin 2 of the Mic e +ve s Pin 3 ---------------||--------------- Pin 3 of the Mic k Pin 1 ------------------------------ Pin 1 of the Mic Arent Ribbon Mics a bit delicate to take on the road ??? Regards Richard Freeman |
#6
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote in message m... Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Two options : 1:1 Isolation Transformer - The better Transformers usually cost more and it is not difficult to spend $100 on a decent Transformer ... Capacitors in Series with the Signal - 47uF is usually adequate but can depend on the input impedance of your mixing desk - typically 1K or so which will give you low Frequency rolloff with a -3dB point of 3Hz Of course the Desks internal Decoupling Caps will be in Series with this so this will probably raise your -3dB point to 7 Hz or so. D Pin 2 ---------------||--------------- Pin 2 of the Mic e +ve s Pin 3 ---------------||--------------- Pin 3 of the Mic k Pin 1 ------------------------------ Pin 1 of the Mic Arent Ribbon Mics a bit delicate to take on the road ??? Regards Richard Freeman |
#7
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote in message m... Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Two options : 1:1 Isolation Transformer - The better Transformers usually cost more and it is not difficult to spend $100 on a decent Transformer ... Capacitors in Series with the Signal - 47uF is usually adequate but can depend on the input impedance of your mixing desk - typically 1K or so which will give you low Frequency rolloff with a -3dB point of 3Hz Of course the Desks internal Decoupling Caps will be in Series with this so this will probably raise your -3dB point to 7 Hz or so. D Pin 2 ---------------||--------------- Pin 2 of the Mic e +ve s Pin 3 ---------------||--------------- Pin 3 of the Mic k Pin 1 ------------------------------ Pin 1 of the Mic Arent Ribbon Mics a bit delicate to take on the road ??? Regards Richard Freeman |
#8
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Phantom Power Filtering (removal of phantom power)...
"Arny Krueger" wrote in message ... "Chris Breitner" wrote in message m Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... |
#9
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Phantom Power Filtering (removal of phantom power)...
"Arny Krueger" wrote in message ... "Chris Breitner" wrote in message m Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... |
#10
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Phantom Power Filtering (removal of phantom power)...
"Arny Krueger" wrote in message ... "Chris Breitner" wrote in message m Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... |
#11
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Phantom Power Filtering (removal of phantom power)...
Chris Breitner wrote: Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris If its your board, go into one of the channels and remove the two phantom resistors from the channel you want to use the ribbon on. It will just cost you some time (if you know what your doing that is) Otherwise, a good isolation transformer as some else suggested externally Bob -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#12
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Phantom Power Filtering (removal of phantom power)...
Chris Breitner wrote: Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris If its your board, go into one of the channels and remove the two phantom resistors from the channel you want to use the ribbon on. It will just cost you some time (if you know what your doing that is) Otherwise, a good isolation transformer as some else suggested externally Bob -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#13
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Phantom Power Filtering (removal of phantom power)...
Chris Breitner wrote: Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris If its your board, go into one of the channels and remove the two phantom resistors from the channel you want to use the ribbon on. It will just cost you some time (if you know what your doing that is) Otherwise, a good isolation transformer as some else suggested externally Bob -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#14
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Phantom Power Filtering (removal of phantom power)...
Chris Breitner wrote:
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Someone will, I hope, correct me if I'm wrong, but couldn't you just lift the ground and go with a floating ground? The potential is between pin 1 (the ground) and pin 2 and between pin 1 (the ground) and pin 3. There is no potential between pins 2 and 3 because there are equal value resistors between them and the +48V of the phantom power. I'm assuming, of course, that cutting the ground near the mic will still provide you with adequate noise shielding, etc. - Logan |
#15
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Phantom Power Filtering (removal of phantom power)...
Chris Breitner wrote:
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Someone will, I hope, correct me if I'm wrong, but couldn't you just lift the ground and go with a floating ground? The potential is between pin 1 (the ground) and pin 2 and between pin 1 (the ground) and pin 3. There is no potential between pins 2 and 3 because there are equal value resistors between them and the +48V of the phantom power. I'm assuming, of course, that cutting the ground near the mic will still provide you with adequate noise shielding, etc. - Logan |
#16
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Phantom Power Filtering (removal of phantom power)...
Chris Breitner wrote:
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Someone will, I hope, correct me if I'm wrong, but couldn't you just lift the ground and go with a floating ground? The potential is between pin 1 (the ground) and pin 2 and between pin 1 (the ground) and pin 3. There is no potential between pins 2 and 3 because there are equal value resistors between them and the +48V of the phantom power. I'm assuming, of course, that cutting the ground near the mic will still provide you with adequate noise shielding, etc. - Logan |
#17
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Phantom Power Filtering (removal of phantom power)...
"Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! .................... Phil |
#18
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Phantom Power Filtering (removal of phantom power)...
"Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! .................... Phil |
#19
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Phantom Power Filtering (removal of phantom power)...
"Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! .................... Phil |
#20
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote ...
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? It might help to actually reveal the make/model of your microphone. It may be one that tolerates phantom power just fine without any mucking about. Especially if it is a newer one that presumably survives life on the road. (?) |
#21
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote ...
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? It might help to actually reveal the make/model of your microphone. It may be one that tolerates phantom power just fine without any mucking about. Especially if it is a newer one that presumably survives life on the road. (?) |
#22
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Phantom Power Filtering (removal of phantom power)...
"Chris Breitner" wrote ...
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? It might help to actually reveal the make/model of your microphone. It may be one that tolerates phantom power just fine without any mucking about. Especially if it is a newer one that presumably survives life on the road. (?) |
#23
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Phantom Power Filtering (removal of phantom power)...
"Logan Shaw" Someone will, I hope, correct me if I'm wrong, but couldn't you just lift the ground and go with a floating ground? The potential is between pin 1 (the ground) and pin 2 and between pin 1 (the ground) and pin 3. There is no potential between pins 2 and 3 because there are equal value resistors between them and the +48V of the phantom power. I'm assuming, of course, that cutting the ground near the mic will still provide you with adequate noise shielding, etc. ** Why don't you try out your own idea and check your assumption ??? ............... Phil |
#24
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Phantom Power Filtering (removal of phantom power)...
"Logan Shaw" Someone will, I hope, correct me if I'm wrong, but couldn't you just lift the ground and go with a floating ground? The potential is between pin 1 (the ground) and pin 2 and between pin 1 (the ground) and pin 3. There is no potential between pins 2 and 3 because there are equal value resistors between them and the +48V of the phantom power. I'm assuming, of course, that cutting the ground near the mic will still provide you with adequate noise shielding, etc. ** Why don't you try out your own idea and check your assumption ??? ............... Phil |
#25
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Phantom Power Filtering (removal of phantom power)...
"Logan Shaw" Someone will, I hope, correct me if I'm wrong, but couldn't you just lift the ground and go with a floating ground? The potential is between pin 1 (the ground) and pin 2 and between pin 1 (the ground) and pin 3. There is no potential between pins 2 and 3 because there are equal value resistors between them and the +48V of the phantom power. I'm assuming, of course, that cutting the ground near the mic will still provide you with adequate noise shielding, etc. ** Why don't you try out your own idea and check your assumption ??? ............... Phil |
#26
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Phantom Power Filtering (removal of phantom power)...
"philicorda" wrote in message news On Wed, 30 Jun 2004 17:44:19 -0700, Chris Breitner wrote: Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris You could use a battery phantom power supply box for this. It may sound silly, but if it's off and has no batteries in it, it should just block the dc and pass the mic signal. You should check with a meter, just to make sure. But if it uses polarized capacitors (quite likely), they will be facing in the wrong direction. |
#27
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Phantom Power Filtering (removal of phantom power)...
"philicorda" wrote in message news On Wed, 30 Jun 2004 17:44:19 -0700, Chris Breitner wrote: Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris You could use a battery phantom power supply box for this. It may sound silly, but if it's off and has no batteries in it, it should just block the dc and pass the mic signal. You should check with a meter, just to make sure. But if it uses polarized capacitors (quite likely), they will be facing in the wrong direction. |
#28
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Phantom Power Filtering (removal of phantom power)...
"philicorda" wrote in message news On Wed, 30 Jun 2004 17:44:19 -0700, Chris Breitner wrote: Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris You could use a battery phantom power supply box for this. It may sound silly, but if it's off and has no batteries in it, it should just block the dc and pass the mic signal. You should check with a meter, just to make sure. But if it uses polarized capacitors (quite likely), they will be facing in the wrong direction. |
#29
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Phantom Power Filtering (removal of phantom power)...
Phil Allison wrote:
"Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! Never heard of a centre-tapped transformer as often used in what would now be vintage gear ? Nice DC R connecting all the pins. Had a real problem once ( thankfully a long time ago ) when given some gear to set up for a 'society event' with CT balanced outputs that had to be connected to unbalanced inputs. I'll leave you to guess which way the cables were wired. Thankfully I was able to troubleshoot it on the spot. The hired DJ ( a well known radio celebrity ) had kittens quietly while I fixed it. Needless to say, I wasn't best pleased. Thank goodness these days for floating balanced outputs. Graham |
#30
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Phantom Power Filtering (removal of phantom power)...
Phil Allison wrote:
"Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! Never heard of a centre-tapped transformer as often used in what would now be vintage gear ? Nice DC R connecting all the pins. Had a real problem once ( thankfully a long time ago ) when given some gear to set up for a 'society event' with CT balanced outputs that had to be connected to unbalanced inputs. I'll leave you to guess which way the cables were wired. Thankfully I was able to troubleshoot it on the spot. The hired DJ ( a well known radio celebrity ) had kittens quietly while I fixed it. Needless to say, I wasn't best pleased. Thank goodness these days for floating balanced outputs. Graham |
#31
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Phantom Power Filtering (removal of phantom power)...
Phil Allison wrote:
"Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! Never heard of a centre-tapped transformer as often used in what would now be vintage gear ? Nice DC R connecting all the pins. Had a real problem once ( thankfully a long time ago ) when given some gear to set up for a 'society event' with CT balanced outputs that had to be connected to unbalanced inputs. I'll leave you to guess which way the cables were wired. Thankfully I was able to troubleshoot it on the spot. The hired DJ ( a well known radio celebrity ) had kittens quietly while I fixed it. Needless to say, I wasn't best pleased. Thank goodness these days for floating balanced outputs. Graham |
#32
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Phantom Power Filtering (removal of phantom power)...
"Pooh Bear" wrote in message ... Phil Allison wrote: "Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! Never heard of a centre-tapped transformer as often used in what would now be vintage gear ? Nice DC R connecting all the pins. ** Got any idea at all why the ohm meter tests are being suggested at all ????????????? It would **really ** help if you pulled your fat head out of your bum prior to posting, Pooh. ................. Phil |
#33
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Phantom Power Filtering (removal of phantom power)...
"Pooh Bear" wrote in message ... Phil Allison wrote: "Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! Never heard of a centre-tapped transformer as often used in what would now be vintage gear ? Nice DC R connecting all the pins. ** Got any idea at all why the ohm meter tests are being suggested at all ????????????? It would **really ** help if you pulled your fat head out of your bum prior to posting, Pooh. ................. Phil |
#34
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Phantom Power Filtering (removal of phantom power)...
"Pooh Bear" wrote in message ... Phil Allison wrote: "Richard Freeman" .. "Arny Krueger" "Chris Breitner" I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Measure the resistance from pin 2 and 3 to pin 1 using an ohm meter with limited current, such as a good DVM.. If it is infinity, you don't have a problem, and then stop worrying. Of course it could have a Transformer isolated output in which case he could read a near short and still not have to worry .... ** You better **re-read** what Arny posted - ie test from pins " 2 and 3 to pin 1 " !!!!!!! Never heard of a centre-tapped transformer as often used in what would now be vintage gear ? Nice DC R connecting all the pins. ** Got any idea at all why the ohm meter tests are being suggested at all ????????????? It would **really ** help if you pulled your fat head out of your bum prior to posting, Pooh. ................. Phil |
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Phantom Power Filtering (removal of phantom power)...
On Wed, 30 Jun 2004 17:44:19 -0700, Chris Breitner wrote:
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris You could use a battery phantom power supply box for this. It may sound silly, but if it's off and has no batteries in it, it should just block the dc and pass the mic signal. You should check with a meter, just to make sure. |
#36
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Phantom Power Filtering (removal of phantom power)...
On Wed, 30 Jun 2004 17:44:19 -0700, Chris Breitner wrote:
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris You could use a battery phantom power supply box for this. It may sound silly, but if it's off and has no batteries in it, it should just block the dc and pass the mic signal. You should check with a meter, just to make sure. |
#37
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Phantom Power Filtering (removal of phantom power)...
On Wed, 30 Jun 2004 17:44:19 -0700, Chris Breitner wrote:
Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris You could use a battery phantom power supply box for this. It may sound silly, but if it's off and has no batteries in it, it should just block the dc and pass the mic signal. You should check with a meter, just to make sure. |
#38
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Phantom Power Filtering (removal of phantom power)...
One possibility I didn't see presented is a separate mic pre for the ribbon,
which then goes into the line in rather than through the mic input. There are a couple of "buy it now" Studio Projects VTB1s on ebay right now for $129. Not an un-useful purchase anyway, and it easily fits your requirements. http://cgi.ebay.com/ws/eBayISAPI.dll...38307 79&rd=1 -- Roger W. Norman SirMusic Studio "Chris Breitner" wrote in message m... Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris |
#39
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Phantom Power Filtering (removal of phantom power)...
One possibility I didn't see presented is a separate mic pre for the ribbon,
which then goes into the line in rather than through the mic input. There are a couple of "buy it now" Studio Projects VTB1s on ebay right now for $129. Not an un-useful purchase anyway, and it easily fits your requirements. http://cgi.ebay.com/ws/eBayISAPI.dll...38307 79&rd=1 -- Roger W. Norman SirMusic Studio "Chris Breitner" wrote in message m... Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris |
#40
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Phantom Power Filtering (removal of phantom power)...
One possibility I didn't see presented is a separate mic pre for the ribbon,
which then goes into the line in rather than through the mic input. There are a couple of "buy it now" Studio Projects VTB1s on ebay right now for $129. Not an un-useful purchase anyway, and it easily fits your requirements. http://cgi.ebay.com/ws/eBayISAPI.dll...38307 79&rd=1 -- Roger W. Norman SirMusic Studio "Chris Breitner" wrote in message m... Hey Everyone. I can't seem to find the answer and/or product to satisfy my needs: a phantom power filter/remover. I have a ribbon mic I'd like to gig with, and the PA systems we use normally plug into have an all-channels-on/off for the phantom power. Our vocalist uses a condenser mic, so she needs it on. If the phantom power hits my ribbon mic, it might permanently damage the ribbon element. Does anyone know of a DIY homebrew solution? Thanks, Chris |
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